The anti-lock braking system (ABS) on the Mazda6 prevents the brakes from locking during an emergency stop. The ABS controller does this by reducing the braking force to any wheel that is rotating significantly more slowly than the others. The ABS warning light may mean you need to replace the ABS controller. However, a non-functioning ABS does not necessarily mean your vehicle is unsafe to drive.
Instructions
- 1
Determine which ABS controller your Mazda6 will need. You'll want to be sure the new controller is compatible with your make and model of Mazda6. All versions of the Mazda6 are equipped with an ABS controller that is integrated into the hydraulic control unit.
2Configure the old hydraulic control unit before removal to avoid getting diagnostic trouble code B2477. Turn the ignition switch off and connect a scan tool to the data link connector.
3Input your vehicle information as directed by the scan tool. Select "Module programming" from the scan tool menu, go to "Programmable Module Installation" and select "ABS/TCS". Clear any diagnostic trouble codes.
4Mark the locations of the brake pipes on the hydraulic control unit to aid in installation of the new hydraulic control unit. Apply tape to the hydraulic control unit to protect it from brake fluid and disconnect the brake lines from the hydraulic control unit with a socket wrench. Remove the mounting bolts for the hydraulic control unit with a socket wrench and detach it from your vehicle.
5Install the new hydraulic control unit with ABS controller and use a torque wrench to tighten its mounting bolts to between 7.8 and 10.8 foot pounds. Use the marks you made earlier to align the brake lines. Torque the fittings on the brake lines to between 12.8 and 21.6 foot pounds.
6Complete the installation by bleeding the brake system.
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